{
  "fix": "RHSA-2026:89759",
  "url": "https://patchblox.com/security/fix/linux/rhsa-2026-89759",
  "summary": "RHSA-2026:89759, released August 28, 2026, fixes 7 CVEs in libxml2 (version 2.12.5-9.el10_0.9). None of them is reported as exploited. Patch Radar priority: High.",
  "platform": "linux",
  "type": "advisory",
  "title": "libxml2 security update",
  "released": "2026-08-28T00:38:13Z",
  "priority": "High",
  "priorityTier": 3,
  "priorityReason": "Closes CVE-2026-74860, high severity",
  "supported": true,
  "cveCount": 7,
  "exploitedCveCount": 0,
  "kevCveCount": 0,
  "ransomwareCveCount": 0,
  "maxEpss": 0.00658,
  "maxCvss": 8.5,
  "vendorAdvisory": "https://access.redhat.com/errata/RHSA-2026:89759",
  "appliesTo": [
    {
      "product": "libxml2",
      "productUrl": "https://patchblox.com/security/product/linux/libxml2",
      "release": "RHEL 10",
      "fixedVersion": "2.12.5-9.el10_0.9",
      "supported": true
    }
  ],
  "cves": [
    {
      "cveId": "CVE-2026-74860",
      "url": "https://patchblox.com/security/cve/CVE-2026-74860",
      "title": "libxml2: A flaw was found in libxml2 with Python bindings enabled",
      "priority": "High",
      "severity": "high",
      "cvss": 8.5,
      "epss": 0.00658,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-86143",
      "url": "https://patchblox.com/security/cve/CVE-2026-86143",
      "title": "In xmlIO in libxml2 before 2.15.4, an inconsistency in xmlOutputWriteCallback and xmlBufUse causes negative lengths to reach write callbacks, aka a lack of a check for integer overflow before calling writecallback. This has security relevance for many types of uses of that length value within a callback.",
      "priority": "High",
      "severity": "Moderate",
      "cvss": 8.5,
      "epss": 0.00194,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-86144",
      "url": "https://patchblox.com/security/cve/CVE-2026-86144",
      "title": "In xinclude in libxml2 before 2.15.4, xmlXIncludeProcess and xmlXIncludeProcessTree do not propagate parseFlags. This has security relevance for, for example, the XML_PARSE_NONET flag, if (without it) a custom resource loader accesses the internet and triggers XML external entity injection, SSRF, or a denial of service (e.g., for an attacker-controlled internet resource that is intentionally slow).",
      "priority": "High",
      "severity": "Moderate",
      "cvss": 8.5,
      "epss": 0.00186,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-86140",
      "url": "https://patchblox.com/security/cve/CVE-2026-86140",
      "title": "In libxml2 before 2.15.4, xmlSnprintfElements in valid.c has a strcat stack-based buffer overflow.",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.5,
      "epss": 0.00157,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-86142",
      "url": "https://patchblox.com/security/cve/CVE-2026-86142",
      "title": "In libxml2 before 2.15.4, there is a heap-based buffer overflow in xmlXPtrEvalXPtrPart because of xmlXPtrEval xpointer length saturation.",
      "priority": "High",
      "severity": "Moderate",
      "cvss": 8.5,
      "epss": 0.00157,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-11979",
      "url": "https://patchblox.com/security/cve/CVE-2026-11979",
      "title": "Stack-Based Buffer Overflow in libxml2",
      "priority": "High",
      "severity": "Low",
      "cvss": 7.8,
      "epss": 0.00148,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-86138",
      "url": "https://patchblox.com/security/cve/CVE-2026-86138",
      "title": "In libxml2 before 2.15.4, xmlDictAddQString in dict.c has an integer overflow and resultant heap-based buffer overflow.",
      "priority": "High",
      "severity": "Moderate",
      "cvss": 8.5,
      "epss": 0.00132,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    }
  ],
  "dataAsOf": "2026-11-07T18:46:35Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}